package com.lp.controller;

import com.lp.VO.ProductInfoVO;
import com.lp.VO.ProductVO;
import com.lp.VO.ResultVO;
import com.lp.dataobject.ProductCategory;
import com.lp.dataobject.ProductInfo;
import com.lp.service.CategoryService;
import com.lp.service.ProductService;
import com.lp.utils.ResultVoUtil;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/buyer/product")
public class BuyerProductController {
    @Autowired
    private ProductService productService;
    @Autowired
    private CategoryService categoryService;
    @GetMapping("/list")
    public ResultVO list(){
        //1.查询所有上架商品
        List<ProductInfo> productInfoList =productService.findUpAll();
        //2.查询类目（一次性查询）
//        List<Integer> categoryTypeList = new ArrayList<>();
//        //传统方法
//        for (ProductInfo productInfo : productInfoList) {
//            categoryTypeList.add(productInfo.getCategoryType());
//        }
        //精简方法(java8,lambda)
        List<Integer> categoryTypeList = productInfoList.stream().map(e -> e.getCategoryType()).collect(Collectors.toList());
        List<ProductCategory> categoryList = categoryService.findByCategoryTypeIn(categoryTypeList);

        //3.数据拼装
        List<ProductVO> productVOList = new ArrayList<>();
        for (ProductCategory productCategory:categoryList) {
            ProductVO productVO = new ProductVO();
            productVO.setCategoryType(productCategory.getCategoryType());
            productVO.setCategoryName(productCategory.getCategoryName());

            List<ProductInfoVO> productInfoVOList = new ArrayList<>();
            for (ProductInfo productInfo:productInfoList) {
                if (productInfo.getCategoryType().equals(productCategory.getCategoryType())){
                    ProductInfoVO productInfoVO = new ProductInfoVO();
                    BeanUtils.copyProperties(productInfo,productInfoVO);
                    productInfoVOList.add(productInfoVO);
                }
            }
            productVO.setProductInfoVOList(productInfoVOList);
            productVOList.add(productVO);

        }

//        ResultVO resultVO = new ResultVO();
//        resultVO.setData(productVOList);
//        resultVO.setCode(0);
//        resultVO.setMessage("成功");
//        return  resultVO;

        return ResultVoUtil.success(productVOList);
    }
}
